That may be true, but that's not a good data set to use either way.
The graph only accounts for 45 million houses in the US, including only the houses owned by the young and the old. But that is a small fraction of US homes. (If those were all homes, the average household size would be 7 people.)
The graph only accounts for 45 million houses in the US, including only the houses owned by the young and the old. But that is a small fraction of US homes. (If those were all homes, the average household size would be 7 people.)